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Error 5 when installing service pack 2

Last response: in Windows XP
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Anonymous
February 11, 2010 3:21:09 PM

Hello,
I got an error 5:access denied could not back up registry key when trying to install Service Pack 2 for Windows xp
February 11, 2010 4:17:22 PM

Has the registry key already been used? If so, you would more than likely have to order a replacement registry key from one of Microsoft's caller lines. I beileve a new key would cost around 20 USD, not quite sure though. Hopefully, this will help. :??: 
February 12, 2010 12:44:48 AM

you can edit the Permissions on this
registry key to see if doing so will allow the installation of SP2 to
complete :

Start > Run > type in

regedit
Click OK or press Enter

Click the plus sign next to HKEY_CLASSES_ROOT
Scroll down to .dvr-ms
*Right* clickt .dvr-ms and choose Permissions
Make sure that System is listed with these Permissions:

Full Control
Read

If not, check those boxes and then click Apply, OK.
Close the registry editor.
Then read the pre-installation links that PABear provided.

IF the Access Denied message appears after doing all of the above, check
http://winhlp.com/node/125#Cannot_install_Service_Pack_...
specifically, the 'Access Denied' section.
February 12, 2010 12:45:31 AM

Log-on as Administrator and disable your anti-virus application before
attempting to install WinXP SP2.

Windows XP Service Pack 2 Problem Solver:
http://winhlp.com/WxSP2.htm

What to Know Before Downloading/Installing SP2
http://www.microsoft.com/windowsxp/sp2/sp2_whattoknow.m...

Installing SP2 Step-by-Step
http://support.microsoft.com/default.aspx?scid=fh;[ln];xpsp2insthowto

Troubleshooting Your Installation
http://support.microsoft.com/default.aspx?scid=fh;[ln];xpsp2insttshoot

WinXP SP2 FAQ: What to do after installing SP2
http://support.microsoft.com/default.aspx?scid=fh;ln;xpsp2installed

Service Pack (any) Installation Checklist (MVP Jupiter Jones)
http://www3.telus.net/dandemar/spackins.htm

WinXP SP2-specific Page (MVP Jupiter Jones)
http://www3.telus.net/dandemar/xpsp2.htm

The hard disk space requirements for Windows XP Service Pack 2
http://support.microsoft.com/default.aspx?kbid=837783
!